Overview
Acute suppurative thyroiditis (AST) is an inflammatory condition of the thyroid gland often complicated by the presence of a pyriform sinus-thyroid fistula, particularly in pediatric patients 1.Diagnosis
Clinical Presentation: Fever, neck pain, swelling, and tenderness over the thyroid gland 1.
Imaging: Ultrasound (US) is crucial; a new sign termed the "emerging echogenic tract sign" may indicate a patent pyriform sinus-thyroid fistula 1.
Confirmatory Tests: Barium esophagography to confirm the presence of a fistula once suggested by imaging findings 1.Management
Antibiotics: Broad-spectrum antibiotics are typically initiated empirically, targeting common pathogens (e.g., Staphylococcus aureus) 1.
Surgical Intervention: Definitive treatment may require surgical drainage and fistula closure if conservative management fails 1.
Supportive Care: Pain management and monitoring for complications such as airway compromise 1.Special Populations
Pediatrics: AST commonly involves pyriform sinus-thyroid fistulas, necessitating careful imaging and timely diagnostic confirmation 1.Key Recommendations
Recognize the "emerging echogenic tract sign" on follow-up ultrasound as a potential indicator of pyriform sinus-thyroid fistula in patients with AST (Evidence: Moderate) 1.
Consider barium esophagography for definitive diagnosis of pyriform sinus-thyroid fistula when suggested by imaging findings (Evidence: Moderate) 1.
Initiate broad-spectrum antibiotic therapy empirically for suspected AST, adjusting based on culture results (Evidence: Expert opinion) 1.References
1 Park NH, Park HJ, Park CS, Kim MS, Park SI. The emerging echogenic tract sign of pyriform sinus fistula: an early indicator in the recovery stage of acute suppurative thyroiditis. AJNR. American journal of neuroradiology 2011. link